President Barack Obama pauses as he speaks during a memorial service for the victims and relatives of the Sandy Hook Elementary School shooting on December 16, 2012 in Newtown, Connecticut. Twenty-six people were killed when a gunman entered Sandy Hook Elementary and began a shooting spree. (MANDEL NGAN/AFP/Getty Images)

WASHINGTON, DC -- President Barack Obama is asking a team led by Vice President Joe Biden to offer "concrete proposals" to curb gun violence no later than January, in the aftermath of the horrific massacre at a Connecticut elementary school.